VAIO Control Center driver for SONYVGN-SZ791N/­XThis utility installs the originally shipped version of the VAIO®Control Center

The Most Efficient Way to Update Sony Drivers

There are a variety of typical warnings and other messages that you could get in the driver upgrading process, several of which I've paraphrased and listed here together with advice on what to do:

QUESTION: So I have a Sony Vaio SVD13233CXB and the usb ports are not working. Optical 3 button mouses cannot connect nor can my USB both of which work on other computers. I have absolutely no idea what the problem is.

Although, I looked into device manager and found USB root hub xhcl had an exclamation mark next to it. It says that it cannot load the device driver for this hardware. The driver could be corrupted or missing. (Code 39). After I try to update the driver for it it says the driver is up to date. Does this have anything to do with it?

I've also tried uninstalling all the usb extensions and rebooting. It did nothing (All the extensions came back even xhcl with the exclamation mark).

I really have no idea what to do and any help will be appreciated.

ANSWER: Possibly the driver is corrupted or the USB devices are busted. Let's isolate the issue. Kindly follow these steps:

Power cycle - Remove the battery and all peripherals -> press and hold the power button for 5 seconds OR, if the battery is not removable, remove all peripherals -> look for a battery off button on the bottom of the laptop -> push the button for 5 seconds

Way to Update Drivers with Device Manager

1. Open Control Panel

Note: If you don't see these options, your Control Panel view may be set to Large icons, Small icons, or Classic View, depending on your version of Windows. If so, find and choose Device Manager from the big collection of icons you see and then skip to Step 3 below.

2. Open Device Manager

From the open Control Panel window, click System, choose the Hardware tab, and then click the Device Manager button.

3. With Device Manager now open, you can view a device's status, update the device drivers, or do whatever other hardware management you came here to do.

To download and update the driver for SONY VGN-SZ791N/X yourself (If you know computers well)

It's best to let Windows install device drivers automatically. But if Windows can't find a driver for your SONY VGN-SZ791N/X, you can look for a driver on the manufacturer's website of SONY. Driver updates are often available in the support section of such sites.

Once you find the updated driver, follow the installation instructions on the website. Most drivers are self-installing—after you download them, you usually double-click the file to begin the installation, and then the driver installs itself on your computer. What you should know is that a wrong driver may cause system malfunctioning which you should be careful about. Download a professional driver updater or find a geek to help you.